Mitsubishi is shelling out nearly $600 million as a joint venture partner for an expanded copper mine project in Arizona.

U.S. President Donald Trump has slammed an appeals court decision to temporarily block plans to develop a massive Arizona copper project. His comments come shortly after he met the chief executives of ...

Trump called those opposing the mine ‘Anti-American’ and said the country needs copper ‘NOW!’ Opponents of the mine, including the San Carlos Apache Tribe, said they will never stop fighting to ...

As the Arizona Trail winds past the proposed Oak Flat copper mine, the search for climate solutions takes on new meaning.

To continue reading this content, please enable JavaScript in your browser settings and refresh this page. Preview this article 1 min Mitsubishi is putting up nearly ...